diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 05125ab..72b53b9 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1849,6 +1849,7 @@ config XEN
 	depends on CPU_V7 && !CPU_V6
 	depends on !GENERIC_ATOMIC64
 	select ARM_PSCI
+	select SWIOTLB_XEN
 	help
 	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
 
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h
index 359a7b5..b0f7150 100644
--- a/arch/arm/include/asm/xen/page.h
+++ b/arch/arm/include/asm/xen/page.h
@@ -6,12 +6,14 @@
 
 #include <linux/pfn.h>
 #include <linux/types.h>
+#include <linux/dma-mapping.h>
 
 #include <xen/interface/grant_table.h>
 
 #define pfn_to_mfn(pfn)			(pfn)
 #define phys_to_machine_mapping_valid(pfn) (1)
 #define mfn_to_pfn(mfn)			(mfn)
+#define mfn_to_local_pfn(m)             (mfn_to_pfn(m))
 #define mfn_to_virt(m)			(__va(mfn_to_pfn(m) << PAGE_SHIFT))
 
 #define pte_mfn	    pte_pfn
diff --git a/arch/arm/xen/Makefile b/arch/arm/xen/Makefile
index 4384103..66fc35d 100644
--- a/arch/arm/xen/Makefile
+++ b/arch/arm/xen/Makefile
@@ -1 +1 @@
-obj-y		:= enlighten.o hypercall.o grant-table.o
+obj-y		:= enlighten.o hypercall.o grant-table.o mm.o
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 14d17ab..06a6953 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -195,6 +195,7 @@ static void xen_power_off(void)
  * documentation of the Xen Device Tree format.
  */
 #define GRANT_TABLE_PHYSADDR 0
+extern int xen_mm_init(void);
 void __init xen_early_init(void)
 {
 	struct resource res;
@@ -230,6 +231,8 @@ void __init xen_early_init(void)
 		xen_start_info->flags |= SIF_INITDOMAIN|SIF_PRIVILEGED;
 	else
 		xen_start_info->flags &= ~(SIF_INITDOMAIN|SIF_PRIVILEGED);
+
+	xen_mm_init();
 }
 
 static int __init xen_guest_init(void)
diff --git a/arch/arm/xen/mm.c b/arch/arm/xen/mm.c
new file mode 100644
index 0000000..22dbf7c
--- /dev/null
+++ b/arch/arm/xen/mm.c
@@ -0,0 +1,117 @@
+#include <linux/bootmem.h>
+#include <linux/gfp.h>
+#include <linux/export.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+#include <linux/swiotlb.h>
+
+#include <xen/xen.h>
+#include <xen/interface/memory.h>
+#include <xen/swiotlb-xen.h>
+
+#include <asm/cacheflush.h>
+#include <asm/xen/page.h>
+#include <asm/xen/hypercall.h>
+#include <asm/xen/interface.h>
+
+static int xen_exchange_memory(xen_ulong_t extents_in,
+			       unsigned int order_in,
+			       xen_pfn_t *pfns_in,
+			       xen_ulong_t extents_out,
+			       unsigned int order_out,
+			       xen_pfn_t *mfns_out,
+			       unsigned int address_bits)
+{
+	long rc;
+	int success;
+
+	struct xen_memory_exchange exchange = {
+		.in = {
+			.nr_extents   = extents_in,
+			.extent_order = order_in,
+			.domid        = DOMID_SELF
+		},
+		.out = {
+			.nr_extents   = extents_out,
+			.extent_order = order_out,
+			.address_bits = address_bits,
+			.domid        = DOMID_SELF
+		}
+	};
+	set_xen_guest_handle(exchange.in.extent_start, pfns_in);
+	set_xen_guest_handle(exchange.out.extent_start, mfns_out);
+
+	BUG_ON(extents_in << order_in != extents_out << order_out);
+
+
+	rc = HYPERVISOR_memory_op(XENMEM_get_dma_buf, &exchange);
+	success = (exchange.nr_exchanged == extents_in);
+
+	BUG_ON(!success && ((exchange.nr_exchanged != 0) || (rc == 0)));
+	BUG_ON(success && (rc != 0));
+
+	return success;
+}
+
+int xen_create_contiguous_region(unsigned long vstart, unsigned int order,
+				 unsigned int address_bits,
+				 dma_addr_t *dma_handle)
+{
+	phys_addr_t pstart = __pa(vstart);
+	xen_pfn_t in_frame, out_frame;
+	int success;
+
+	/* 2. Get a new contiguous memory extent. */
+	in_frame = out_frame = pstart >> PAGE_SHIFT;
+	success = xen_exchange_memory(1, order, &in_frame,
+				      1, order, &out_frame,
+				      address_bits);
+
+	if (!success)
+		return -ENOMEM;
+
+	*dma_handle = out_frame << PAGE_SHIFT;
+	
+	return success ? 0 : -ENOMEM;
+}
+EXPORT_SYMBOL_GPL(xen_create_contiguous_region);
+
+void xen_destroy_contiguous_region(unsigned long vstart, unsigned int order)
+{
+	xen_pfn_t in_frame = __pa(vstart) >> PAGE_SHIFT;
+	struct xen_put_dma_buf buf = {
+		.in = {
+			.nr_extents   = 1,
+			.extent_order = order,
+			.domid        = DOMID_SELF
+		},
+	};
+	set_xen_guest_handle(buf.in.extent_start, &in_frame);
+
+	HYPERVISOR_memory_op(XENMEM_put_dma_buf, &buf);
+}
+EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
+
+static struct dma_map_ops xen_swiotlb_dma_ops = {
+	.mapping_error = xen_swiotlb_dma_mapping_error,
+	.alloc = xen_swiotlb_alloc_coherent,
+	.free = xen_swiotlb_free_coherent,
+	.sync_single_for_cpu = xen_swiotlb_sync_single_for_cpu,
+	.sync_single_for_device = xen_swiotlb_sync_single_for_device,
+	.sync_sg_for_cpu = xen_swiotlb_sync_sg_for_cpu,
+	.sync_sg_for_device = xen_swiotlb_sync_sg_for_device,
+	.map_sg = xen_swiotlb_map_sg_attrs,
+	.unmap_sg = xen_swiotlb_unmap_sg_attrs,
+	.map_page = xen_swiotlb_map_page,
+	.unmap_page = xen_swiotlb_unmap_page,
+	.dma_supported = xen_swiotlb_dma_supported,
+};
+
+int __init xen_mm_init(void)
+{
+	xen_swiotlb_init(1, true);
+	dma_ops = &xen_swiotlb_dma_ops;
+	return 0;
+}
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 9737e97..aa1f6fb 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -209,6 +209,7 @@ config XEN_DOM0
 config XEN
 	bool "Xen guest support on ARM64 (EXPERIMENTAL)"
 	depends on ARM64 && OF
+	select SWIOTLB_XEN
 	help
 	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM64.
 
diff --git a/arch/arm64/xen/Makefile b/arch/arm64/xen/Makefile
index be24040..0ef9637 100644
--- a/arch/arm64/xen/Makefile
+++ b/arch/arm64/xen/Makefile
@@ -1,2 +1,2 @@
-xen-arm-y	+= $(addprefix ../../arm/xen/, enlighten.o grant-table.o)
+xen-arm-y	+= $(addprefix ../../arm/xen/, enlighten.o grant-table.o mm.o)
 obj-y		:= xen-arm.o hypercall.o
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 9e02d60..7e83688 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -140,7 +140,6 @@ config XEN_GRANT_DEV_ALLOC
 
 config SWIOTLB_XEN
 	def_bool y
-	depends on PCI && X86
 	select SWIOTLB
 
 config XEN_TMEM
diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 3fadb6b..d19c240 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -59,6 +59,24 @@ static unsigned long xen_io_tlb_nslabs;
  * Quick lookup value of the bus address of the IOTLB.
  */
 
+#ifndef DMA_ERROR_CODE
+#define DMA_ERROR_CODE	(~0)
+#endif
+
+#ifndef CONFIG_X86
+static unsigned long dma_alloc_coherent_mask(struct device *dev,
+					    gfp_t gfp)
+{
+	unsigned long dma_mask = 0;
+
+	dma_mask = dev->coherent_dma_mask;
+	if (!dma_mask)
+		dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);
+
+	return dma_mask;
+}
+#endif
+
 struct xen_dma{
 	dma_addr_t dma_addr;
 	phys_addr_t phys_addr;
